"Well he's a terrible president. He'll probably go down as the worst president in the history of our country, he's been a total disaster," Trump told Sinclair Broadcast group in an interview yesterday.
"You look at what happens in the Middle East, in Syria and his line in the sand. I think it just means he's concerned I'm going to win," he claimed.
"Don't forget last time he said I would never get the nomination, now he is saying I wouldn't get the election now all of a sudden he said the other day maybe I can win the election, no I guess he probably has to say that kind of thing," Trump said when asked about Obama's statement yesterday.
Trump reiterated his stand and said he does not regret having criticised the parents of a slain Pakistani-origin American Muslim soldier Humayun Khan who was killed by a suicide bomber in Iraq in 2004.
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"I don't regret anything. I said nice things about the son and I feel that very strongly but of course I was hit very hard from the stage and you know it's just one of those things but no I don't regret anything," he said.
He also did not had regret calling his Democratic rival Hillary Clinton as a devil.
"No, I don't think so, I think it is what it is. She's a very deceitful person, she lies, she cheats, no I don't think that's too far at all," he said.
He maintained his belief that the upcoming presidential election is rigged.
"I'm talking about at the voter booth. I mean we've seen a lot of things over the years and now without the voter ID's and all the things going on and some bad court cases have come down," Trump said.
"I thought this whole thing was rigged and I think the general election is gonna be, we're gonna have a lot of problems we have to be very careful," Trump said.
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Trump also alleged hat the prestigious New York Times, a top global daily published from New York, will be out of business in three years.
Trump's continued onslaught on the mainstream media comes a day after he described CNN as 'Clinton News Network'.
"Maybe somebody's going to buy it for a little while until they lose all that money, but they'll buy it for a little while and they'll keep it as - you know some rich guys going to buy it," he said.
"The New York Times, which is - it could do worse, I mean frankly that wouldn't be bad if somebody bought it -- but the New York Times is failing badly. They write stories that are so bad about me, and you know all my life I've probably been on the cover of the Times a few times, right?" he said.
"If I have two stories or three stories a day on the cover - today I have two stories, both ridiculous stories. I mean I guess they use me to sell newspapers, but they are so dishonest. The reporting is so dishonest," he said.
"I won't get into individual reporters names, because - I could tell you the good ones and the bad ones. They have a couple of good ones over there, but they are such a dishonest newspaper," he said claiming that the newspaper wants his Democratic presidential rival Hillary Clinton to win the November general elections.